Valentin wilhelmi



(No Model.)

V. WILHELMI.

RANGE BOILER.

Patented Aug"; 12, 1890.

l/VI/E/VTOR ATTUR/VEVE,

UNITED STATES PATENT OFFICE,

VALENTIN IVI-LHELMI, OE PATERSON, NEWV JERSEY.

RANGE-BOILER.

SPECIFICATION forming part Of Letters Patent No. 434,075, dated August12, 1890.

Application filed September 4 1889. Serial No. 322,971- (No model.)

To all whom it may concern:

- Be it known that I, VALENTIN WILHELMI, of Paterson, in the county ofPassaic and State of New Jersey, a citizen of the United States, haveinvented certain new and useful Improvements in Range-Boilers, of whichthe following is a specification.

This invention relates to improvements in that class of boilers that areconnected with the water-backs of ranges and cooking-stoves; and theobject of my invention is to provide a boiler of this kind, whichisstrong and durable and simple in construction.

The invention consists in a rangeboiler composed of a cylindrical shell,a strong ring in each end of the shell, and a head secured to each endof the shell, as will be fully described hereinafter, and finallypointed out in the claim.

In the accompanying drawings, Figure 1 is a vertical longitudinalsectional view of my improved range-boiler. Fig. 2 is a detail sectionalview of a part, showing the mannerin which the heads are connected withthe shell.

Similar letters of reference indicate corresponding parts.

The range-boiler consists of a cylindrical shell or body A, thecap-shaped top head B, and the bottom head 0, the cap-shaped top headhaving a greater curvature than the bottom head. Said shell and headsmay be made of copper, sheet-iron, or any other suitable sheet metal. Ashort distance from each end the shell A is shaped to form anoutwardlyprojecting annular shoulder D. Ateach end, a short distancefrom said shoulder, the shell is provided with an outwardly-projectingannular flange E. Each head B and O is provided with outwardlyprojecting annular shoulder F, and along the edge with anoutwardly-projecting flange G, having the rim H projecting in adirection toward the open part of the head.

In each end of the shell A a heavy metal ring J is placed in such amanner as to rest on the shoulders D, the outer edges of said ringsprojecting beyond the ends of the shell,

and the inner faces thereof being flush with l the shell. The heads Band C are then placed on said rings J in such a manner that theshoulders F of said heads rest on the outer edges of the rings J. Therims I-I of the flanges G then project over the flanges E on the ends ofthe shell and are spun down over the inner faces of said flanges, asshown in dotted lines in Fig. l, and then said flanges G E and the rim Hare spun against the side of the shell, as shown in Fig. 1, the rimmedflange of the head forming a hook-shaped flange engaging the flange ofthe shell, thereby firmly holding the heads on the shell and holding therings J in place. Then the ends are heated and the joints are sweatedin. No riveting is required, the heads are firmly and securely connectedwith the shell, thereby forming a strong and simple boiler, and theparts can be united very readily. The body of the ring projects beyondthe circumference of the main body of the shell, and is adapted toreceive the blows due to handling and transportation and imparts greaterstrength to the shell than when set in a recess flush with the outersurface thereof.

Having thus described my invention, Iclaim as new and desire to secureby Letters Patcut- The combination of a cylindrical boilershell providedwith an outwardly-projecting shoulder near one ,end and an outturnedflange at said end, a cap-shaped head provided with anoutwardly-projecting shoulder near its lower edge and a hook-shapedflange at its lower edge, which engages the outturned flange of theshell, and a metal ring disposed between said shoulders in the annularrecess formed thereby, the body of-the ring projecting circumferentiallybeyond the circumference of the main body of the cylindrical shell,substantially as set forth.

In testimony that I claim the foregoing as my invention I have signed myname in presence of two subscribing witnesses.

VALENTIN \VILI'IELMI.

\Vitnesses: I

OSCAR F. GUNZ, JOHN ALONZO STRALEY.

